.pg-nav{
  background: #4D4742;
  line-height: 60px;
  a{
    color: #fff;
    text-decoration: none;
  }
  ul{
    float: right;
    margin: 0;
    margin-right: 70px;
    padding: 0;
    list-style: none;
    li{
      position: relative;
      float: left;
      padding: 0 18px;
      &:hover:after{
        display: block;
      }
      &:after{
        content: " ";
        position: absolute;
        display: none;
        bottom: 12px;
        left: -10px;
        width: 70%;
        border-bottom: 1px solid #DC4329;
      }
      &:first-child:after{
        left: 10px;
        color: #000;
      }
      &:nth-child(2):after{
        left: 12px;
      }
      &:nth-child(3):after{
        left: 14px;
      }
      &:nth-child(4):after{
        left: 14px;
      }
    }

  }
  .start{
    float: right;
    margin-top: 8px;
    width: 143px; height: 44px;
    line-height: 43px;
    border-radius: 4px;
    text-align: center;
    font-size: 17px;
    font-family: "Microsoft Yahei";
    background-color: #DC4329;
    &:hover{
      background: #E2563A;
    }
  }
}